Sorry to re-open old topic. May I know how with voltage divider schematic you refer on the support page the battery level can be measured? Also, I have coin LIR2450 coin battery on Sodaq ExpLoRer, how could i monitor battery level? thanks lot

Please note that the test release versions will change and this can cause issues with the Arduino IDE's cached copies and their checksums. This can always be fixed by cleaning out the 'staging' folder that Arduino creates (the default location on the Windows platform is in /AppData/Local/Arduino15).